research on car hinges

Hi,
I'm doing a research on car hinges (door, hood and tail gate hinges).
I've found that there were three different manufacturing processes to

built a hinge. Stamping (metal sheets), hot rolled profiling and
forging. I found a few information calling different hinge
manufacturers: stamped hinge are the least expensive. Profilled hinges
are heavier, yet stronger, occupies less space (in a 3D space: the
hinge itself is more voluminous) and a little more expensive and
finally forged hinges are smaller, lighter and even stronger. I wanted
to be sure of the info I had and if anybody could give some more
informations on each technology and what could be the trade-off when
having to choose between each one.
Thanks in advance to everybody!

I am certain you can find solid information about the three
well-established technologies in a college or even local library. I
suspect the Web has great and expansive descriptions of the processes as
well.
I imagine any discussion of of the trade-offs of the methods would
compare such issues as costs, efficiency in using the materials, energy
requirements of the process, final product reliability, and the
"quality" of the finished piece.
It sounds like you have a good research topic to work through.
Good luck!
HTH
--
JJW

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